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<br />Fi <br />1994 & 1995 GREEN RIVER <br />USGS Gage No.09315000 Green River, Ut <br />30000 30 <br />1994 =l~~ 1995 <br />25000 ~-~----------------------- ~ t~ ~.T.....----------------------------------------- 4 ~ 25 <br />~, :,: £~ <br />=~7 ~ ~ f i <br />20000 -----------------!--=.~-----------------~~..----------.....--------------------------_ ~ ...._.._.---------------- 20 <br />~~~ % .~. <br />~` i ` !~~ U <br />V- 15000 - ... ~ ~ ° ._.. .. 15 a <br />.~: : , <br />------ • ~-- .......__.._ _ ~ ~ w~ ~ <br />10000 '' --- 10 <br />5000 ----- - -------------------- ~- -......... ..._-- -.._-- -_...-----~~'4 <br />L <br />f F.! s; 7 <br />~^ <br />O J FMAM J J ASOND.J.YFMAMJ J ASOND 0 <br />-FLOW --~ TEMP <br />gore 2. Green River hydrograph and thermograph as recorded by the USGS at their Near <br />Green River, Ut site (No. 091315000), 1994 and 1995. <br />The San Rafael River is also dominated by large fluctuations in water discharge. Unlike the Green <br />River where peak flow is usually associated with peak snow melt, the smaller San Rafael can <br />often peak as result of stone events. The mean daily discharge, in cubic feet per second, varied <br />from .25 in July 1994 to 65.8 in October 1993 (water year extends from Oct. to Sept.) and 18.4 in <br />April 1995 to 764 in July 1995. The specific conductance also varies greatly, however, overall it <br />tends to be very high. Extremes for 1994 ranged from a minimum of 1200 microsiemens to a <br />maximum of 6300 microsiemens, and extremes for 1995 ranged from a minimum of 690 <br />microsiemens to a maximum of 4300 microsiemens. Due to the high conductivity electrofishing <br />has not been effective, limiting adult razorback sucker sampling in the San Rafael River. <br />DRAFT 5 <br />